Methoxy radical, CH$_3$O is a widely studied and benchmark molecule, both for its spectroscopy and its role in chemical reactions. It possesses a ground $^2$E state which is distorted by the Jahn-Teller interaction and split into $^{2}$E$_{1/2}$ and $^{2}$E$_{3/2}$ components by the spin-orbit interaction. The LIF spectra of the $\tilde{A}^{2}$A$_1$--$\tilde{X}^{2}$E transitions is well-known, but under jet expansion conditions the E$_{1/2}$ component is not observed because it is $\sim$60cm$^{-1}$ higher than E$_{3/2}$ and not populated. A feasible way to study the features of the $\tilde{X}^{2}$E$_{1/2}$ level is to use the Stimulated Emission Pumping (SEP) technique. We have combined our high-resolution laser-induced fluorescence (LIF) spectroscopic ($\Delta\nu\sim$200MHz) with a moderate-resolution laser ($\Delta\nu \sim$0.2cm$^{-1}$). These lasers are controlled by a computer program, which permits both the pump and dump lasers to be fired at specified delays after the photolysis laser producing CH$_3$O. SEP spectra of CH$_3$O were recorded with a resolution of $\approx$300MHz linewidth and measured with a precision $&lt;$100MHz and these data were included in a global data (LIF, SEP, microwave) fitting to determine the parameters of the $\tilde{X}^{2}$E$_{1/2}$ state. The previous assignment of parity for the $^{2}$E$_{1/2}$ state is modified and the value of the spin-orbit splitting revised.